Bonus levelsSuccessfully complete the game, then replay all levels that you previously obtained a vehicle. Complete them to unlock an upgraded version of the original vehicle that will allow you to access new levels.

Alternate ending sequenceSuccessfully complete the game, then defeat the new Boss in the final level again. To view another alternate ending, complete the game, then collect the red gem found in all of the bonus 40 levels. Then, complete the final level to see a second alternate ending.